Question

The figure is made up of $2$ rectangles

What is the perimeter of the big rectangle?

• A. $11r+12$
• B. $22r+24$
• C. $11r$
• D. $11r+6$

Answer 1

Answer: (B)

$22r+24$

$\Rightarrow$ Length of a big rectangle $\left(l\right)=(7r+3+3)cm=(7r+6)cm$

.

$\Rightarrow$ Breadth of a big rectangle $\left(b\right)=(4r+3+3)cm=(4r+6)cm$

$\Rightarrow$ Perimeter of big rectangle $=2(l+b)cm$

$=2\left[\right(7r+6)+(4r+6\left)\right]cm$

$=2[11r+12]cm$

$=22r+24cm$